OEM Glock Frame vs. Lone Wolf?

So I found out today that Lone Wolf is making semi-custom Glock frames (http://www.lonewolfdist.com/Detail.aspx?PROD=80127).

For the life of me though I can't figure out if these are heavier or lighter than the original Glock frames. Is there anyone here who has weighed a Glock (any Glock) with it's original frame vs. the Lone Wolf? I can't imagine there would be much difference but for all I know Lone Wold may have a full-sized steel insert in their frame.